Unix dig tool?

[saleemamalik]

n this problem, we use the useful tool dig tool available on Unix and Linux
hosts to explore the hierarchy of DNS servers. Recall that in Figure 2.21 , a
DNS server higher in the DNS hierarchy delegates a DNS query to a DNS
server lower in the hierarchy, by sending back to the DNS client the name of
that lower-level DNS server. First read the man page for dig, and then answer
the following questions.

a. Starting with a root DNS server (from one of the root servers [a-m].rootservers.
net), initiate a sequence of queries for the IP address for your
department's Web server by using dig. Show the list of the names of DNS
servers in the delegation chain in answering your query.

Could someone show me an example of what I'd type in the unix command line?

[Texan40]

http://linux.die.net/man/1/dig